Petra Laurentien Brinkhorst was born in Leiden on 25 May 1966, the daughter of the former Dutch minister of Economic Affairs, Laurens Jan Brinkhorst and Jantien Brinkhorst-Heringa. She has one brother. She is known by her middle name, Laurentien, a portmanteau of her parents' given names.

Princess Laurentien started primary school in Groningen. Her family then moved to The Hague, where she completed her primary education. She spent four years at the Christelijk Gymnasium Sorghvliet, and a year at the Eerste Vrijzinnige Christelijk Lyceum, both in The Hague. In 1984, she passed the Baccalauréat A examinations at the Lycée français in Tokyo. Her father was working in Japan at the time, being the Permanent Envoy of the European Union.

The engagement of Prince Constantijn and Laurentien Brinkhorst was announced on 16 December 2000. The civil marriage was conducted by Wim Deetman, the mayor of the Hague, in the Oude Raadzaal, Javastraat, the Hague, on 17 May 2001. The church wedding took place two days later on 19 May in the Grote of St Jacobskerk, with Reverend Carel ter Linden officiating.

Laurentien's full title and style is: Her Royal Highness Princess Petra Laurentien of the Netherlands, Princess of Orange-Nassau, Mrs. van Amsberg.

Laurentien was not legally created a princess, but custom allows a wife to use her husband’s titles. All children of the marriage hold the titles Count or Countess of Orange-Nassau and Jonkheer or Jonkvrouw van Amsberg.

By Royal Decree of 15 January 2003, nr. 36, Princess Laurentien was granted her own personal standard.

Princess Laurentien has a long record of fighting against illiteracy in the Netherlands, which is now to be considered an underestimated problem. In 2009, she was designated UNESCO Special Envoy on "Literacy for Development" in recognition of her “outstanding commitment to the promotion of education and her profound dedication to the Organization’s ideals and objectives”. In 2010 she was co-recipient of the Major Bosshardt Prize for her work in combating illiteracy.[6]

Official duties:

Spokesperson for "Scouts for Climate" for the World Organization of the Scout Movement's initiative up to COP15 in Copenhagen.

In October 2014 questions were raised in the Dutch parlement about the illiteracy organization she was running about the expensive parties and prime location of the office of the organization. Furthermore, her own children books appear to have been promoted through the subsidized organization.